Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction

Shanawar Hamid, Satwika Golagana, Seunghee Han, Giehyeon Lee, Moulay Rachid Babaa, Woojin Lee

Research output: Contribution to journalArticle

Abstract

In this study, a novel and highly reactive Sn–Pd catalyst supported by environmentally benign kaolinite (Sn–Pd-kaolinite) was developed and evaluated for stability for effective nitrate (NO3) reduction in batch and continuous mode. Complete NO3 removal with fast reduction kinetics (k = 18.16 × 10−2 min−1) and 71% selectivity toward N2 were achieved by the Sn–Pd-kaolinite catalyst during batch reactions. During continuous tests, 100% NO3 removal and 80% N2 was achieved for 60 h. However, NO3 removal efficiency gradually decreased to 80% in170 h. The catalyst was then successfully regenerated in the system by increasing H2 flow which achieved a complete NO3 removal again. The metal leaching from catalyst surface was negligible (Sn 0.01% and Pd 0.006%) and the structure was stable during the continuous test, confirming that the Sn–Pd-Kaolinite catalyst had a superior reaction kinetics and operational durability.

Original languageEnglish
Article number125115
JournalChemosphere
Volume241
DOIs
Publication statusPublished - 2020 Feb

Fingerprint

Kaolin
Kaolinite
Nitrates
kaolinite
Hot Temperature
catalyst
Heat treatment
nitrate
Catalysts
Catalyst supports
Reaction kinetics
Leaching
reaction kinetics
Durability
durability
Metals
Kinetics
leaching
kinetics
removal

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Hamid, Shanawar ; Golagana, Satwika ; Han, Seunghee ; Lee, Giehyeon ; Babaa, Moulay Rachid ; Lee, Woojin. / Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction. In: Chemosphere. 2020 ; Vol. 241.
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abstract = "In this study, a novel and highly reactive Sn–Pd catalyst supported by environmentally benign kaolinite (Sn–Pd-kaolinite) was developed and evaluated for stability for effective nitrate (NO3−) reduction in batch and continuous mode. Complete NO3− removal with fast reduction kinetics (k = 18.16 × 10−2 min−1) and 71{\%} selectivity toward N2 were achieved by the Sn–Pd-kaolinite catalyst during batch reactions. During continuous tests, 100{\%} NO3− removal and 80{\%} N2 was achieved for 60 h. However, NO3− removal efficiency gradually decreased to 80{\%} in170 h. The catalyst was then successfully regenerated in the system by increasing H2 flow which achieved a complete NO3− removal again. The metal leaching from catalyst surface was negligible (Sn 0.01{\%} and Pd 0.006{\%}) and the structure was stable during the continuous test, confirming that the Sn–Pd-Kaolinite catalyst had a superior reaction kinetics and operational durability.",
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Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction. / Hamid, Shanawar; Golagana, Satwika; Han, Seunghee; Lee, Giehyeon; Babaa, Moulay Rachid; Lee, Woojin.

In: Chemosphere, Vol. 241, 125115, 02.2020.

Research output: Contribution to journalArticle

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T1 - Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction

AU - Hamid, Shanawar

AU - Golagana, Satwika

AU - Han, Seunghee

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AU - Babaa, Moulay Rachid

AU - Lee, Woojin

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